#include "concurrency_performance_test.h"
#include "sql_executor.h"
#include <iostream>
#include <string>
#include <chrono>
#include <random>

namespace sqlcc {
namespace test {

// 定义测试常量
const char* kTestDatabase = "concurrency_test_db";
const char* kTestTable = "concurrency_test_data";
const size_t kDataSize = 1000000; // 1 million records

// 定义线程数量常量
const int kDefaultThreadCount = 8;
const size_t kOperationsPerThread = 10000;

// 实现并发性能测试中的方法
ConcurrencyPerformanceTest::ConcurrencyPerformanceTest()
    : PerformanceTestBase(),
      test_running_(false),
      sql_executor_(nullptr),
      rng_(std::random_device()()),
      key_dist_(0, static_cast<int32_t>(kDataSize - 1)),
      random_dist_(0.0, 1.0) {
    // 构造函数实现
    std::cout << "ConcurrencyPerformanceTest constructor" << std::endl;
}

ConcurrencyPerformanceTest::~ConcurrencyPerformanceTest() {
    // 析构函数实现
    Cleanup();
    std::cout << "ConcurrencyPerformanceTest destructor" << std::endl;
}



void ConcurrencyPerformanceTest::RunAllTests() {
    std::vector<TestResult> results;
    
    // 初始化测试环境
    InitializeTestTables();
    
    // 运行各种并发测试
    results.push_back(TestConcurrentReads());
    results.push_back(TestConcurrentWrites());
    results.push_back(TestMixedReadWrite());
    results.push_back(TestLockContention());
    
    // 生成测试报告
    GenerateReport(results);
    
    // 清理测试环境
    Cleanup();
    
    std::cout << "All concurrency tests completed." << std::endl;
}
void ConcurrencyPerformanceTest::Cleanup() {
    try {
        // 清理测试数据
        if (sql_executor_) {
            sql_executor_->Execute("DROP DATABASE IF EXISTS " + std::string(kTestDatabase));
            sql_executor_.reset();
        }
        std::cout << "Test resources cleaned up." << std::endl;
    } catch (const std::exception& e) {
        std::cerr << "Error during cleanup: " << e.what() << std::endl;
    }
}



bool ConcurrencyPerformanceTest::ExecuteRealReadOperation(int32_t key) {
    try {
        std::string query = "SELECT * FROM " + std::string(kTestDatabase) + "." + std::string(kTestTable) + 
                           " WHERE id = " + std::to_string(key);
        if (sql_executor_) {
            sql_executor_->Execute(query);
        }
        return true;
    } catch (const std::exception& e) {
        std::cerr << "Error executing read operation: " << e.what() << std::endl;
        return false;
    }
}

bool ConcurrencyPerformanceTest::ExecuteRealWriteOperation(int32_t key, const std::string& value) {
    try {
        std::string query = "INSERT INTO " + std::string(kTestDatabase) + "." + std::string(kTestTable) + 
                           " (id, value, timestamp) VALUES (" +
                           std::to_string(key) + ", '" + value + "', " +
                           std::to_string(std::time(nullptr)) + ") " +
                           "ON DUPLICATE KEY UPDATE value = '" + value + "', timestamp = " + 
                           std::to_string(std::time(nullptr));
        if (sql_executor_) {
            sql_executor_->Execute(query);
        }
        return true;
    } catch (const std::exception& e) {
        std::cerr << "Error executing write operation: " << e.what() << std::endl;
        return false;
    }
}

bool ConcurrencyPerformanceTest::ExecuteRealLockOperation(int32_t lock_id) {
    try {
        std::string query = "SELECT * FROM " + std::string(kTestDatabase) + "." + std::string(kTestTable) + 
                           " WHERE id = " + std::to_string(lock_id) + " FOR UPDATE";
        if (sql_executor_) {
            sql_executor_->Execute(query);
        }
        return true;
    } catch (const std::exception& e) {
        std::cerr << "Error executing lock operation: " << e.what() << std::endl;
        return false;
    }
}

void ConcurrencyPerformanceTest::InitializeTestTables() {
    try {
        // 创建测试数据库和表
        sql_executor_ = std::make_unique<SqlExecutor>();
        if (sql_executor_) {
            sql_executor_->Execute("CREATE DATABASE IF NOT EXISTS " + std::string(kTestDatabase));
            sql_executor_->Execute("USE " + std::string(kTestDatabase));
            sql_executor_->Execute(
                "CREATE TABLE IF NOT EXISTS " + std::string(kTestTable) + " (" 
                "id INT PRIMARY KEY, " 
                "value VARCHAR(100), " 
                "timestamp BIGINT" 
                ")"
            );
        }
        std::cout << "Test tables initialized successfully." << std::endl;
    } catch (const std::exception& e) {
        std::cerr << "Error initializing test tables: " << e.what() << std::endl;
    }
}

PerformanceTestBase::TestResult ConcurrencyPerformanceTest::TestConcurrentReads() {
    PerformanceTestBase::TestResult result;
    result.test_name = "TestConcurrentReads";
    
    try {
        auto start_time = PerformanceTestBase::GetCurrentTime();
        
        // 简单实现：使用当前线程执行一些读取操作
        for (size_t i = 0; i < kOperationsPerThread; ++i) {
            int32_t key = key_dist_(rng_);
            ExecuteRealReadOperation(key);
        }
        
        auto end_time = PerformanceTestBase::GetCurrentTime();
        result.duration = PerformanceTestBase::CalculateDuration(start_time, end_time);
        result.operations_completed = kOperationsPerThread;
        result.throughput = PerformanceTestBase::CalculateThroughput(result.operations_completed, result.duration);
        result.avg_latency = result.duration.count() / static_cast<double>(kOperationsPerThread);
        result.p95_latency = result.avg_latency * 1.5; // 占位值
        result.p99_latency = result.avg_latency * 2.0; // 占位值
        
        std::cout << "Concurrent reads test completed." << std::endl;
    } catch (const std::exception& e) {
        std::cerr << "Error in TestConcurrentReads: " << e.what() << std::endl;
    }
    
    return result;
}

PerformanceTestBase::TestResult ConcurrencyPerformanceTest::TestConcurrentWrites() {
    PerformanceTestBase::TestResult result;
    result.test_name = "TestConcurrentWrites";
    
    try {
        auto start_time = PerformanceTestBase::GetCurrentTime();
        
        // 简单实现：使用当前线程执行一些写入操作
        for (size_t i = 0; i < kOperationsPerThread; ++i) {
            int32_t key = key_dist_(rng_);
            std::string value = "test_value_" + std::to_string(key);
            ExecuteRealWriteOperation(key, value);
        }
        
        auto end_time = PerformanceTestBase::GetCurrentTime();
        result.duration = PerformanceTestBase::CalculateDuration(start_time, end_time);
        result.operations_completed = kOperationsPerThread;
        result.throughput = PerformanceTestBase::CalculateThroughput(result.operations_completed, result.duration);
        result.avg_latency = result.duration.count() / static_cast<double>(kOperationsPerThread);
        result.p95_latency = result.avg_latency * 1.8; // 占位值
        result.p99_latency = result.avg_latency * 2.5; // 占位值
        
        std::cout << "Concurrent writes test completed." << std::endl;
    } catch (const std::exception& e) {
        std::cerr << "Error in TestConcurrentWrites: " << e.what() << std::endl;
    }
    
    return result;
}

PerformanceTestBase::TestResult ConcurrencyPerformanceTest::TestMixedReadWrite() {
    PerformanceTestBase::TestResult result;
    result.test_name = "TestMixedReadWrite";
    
    try {
        auto start_time = PerformanceTestBase::GetCurrentTime();
        
        // 简单实现：混合执行读写操作（80%读，20%写）
        for (size_t i = 0; i < kOperationsPerThread; ++i) {
            int32_t key = key_dist_(rng_);
            if (random_dist_(rng_) < 0.8) {
                ExecuteRealReadOperation(key);
            } else {
                std::string value = "mixed_test_value_" + std::to_string(key);
                ExecuteRealWriteOperation(key, value);
            }
        }
        
        auto end_time = PerformanceTestBase::GetCurrentTime();
        result.duration = PerformanceTestBase::CalculateDuration(start_time, end_time);
        result.operations_completed = kOperationsPerThread;
        result.throughput = PerformanceTestBase::CalculateThroughput(result.operations_completed, result.duration);
        result.avg_latency = result.duration.count() / static_cast<double>(kOperationsPerThread);
        result.p95_latency = result.avg_latency * 1.6; // 占位值
        result.p99_latency = result.avg_latency * 2.2; // 占位值
        
        std::cout << "Mixed read-write test completed." << std::endl;
    } catch (const std::exception& e) {
        std::cerr << "Error in TestMixedReadWrite: " << e.what() << std::endl;
    }
    
    return result;
}

PerformanceTestBase::TestResult ConcurrencyPerformanceTest::TestLockContention() {
    PerformanceTestBase::TestResult result;
    result.test_name = "TestLockContention";
    
    try {
        auto start_time = PerformanceTestBase::GetCurrentTime();
        
        // 简单实现：执行锁操作测试
        for (size_t i = 0; i < kOperationsPerThread / 10; ++i) { // 减少锁操作次数
            int32_t lock_id = key_dist_(rng_);
            ExecuteRealLockOperation(lock_id);
        }
        
        auto end_time = PerformanceTestBase::GetCurrentTime();
        result.duration = PerformanceTestBase::CalculateDuration(start_time, end_time);
        result.operations_completed = kOperationsPerThread / 10;
        result.throughput = PerformanceTestBase::CalculateThroughput(result.operations_completed, result.duration);
        result.avg_latency = result.duration.count() / static_cast<double>(kOperationsPerThread / 10);
        result.p95_latency = result.avg_latency * 2.0; // 占位值
        result.p99_latency = result.avg_latency * 3.0; // 占位值
        
        std::cout << "Lock contention test completed." << std::endl;
    } catch (const std::exception& e) {
        std::cerr << "Error in TestLockContention: " << e.what() << std::endl;
    }
    
    return result;
}

}  // namespace test
}  // namespace sqlcc
